Pulley



May 3, 1938. H A ANDREAS 2,115,837

PULLEY Filed March 11, 1957 hm. mamas Patented May 3, 1938 UNITED STATES PATENT OFFICE PULLEY Harry A. Andreas, Muscatine, Iowa Application March 11, 1937, Serial No. 130,377

1 Claim.

This invention relates to pulleys and more particularly to an improved pulley of the sheet metal type which is adapted to have a plurality of V-shaped belts trained thereover.

An object of this invention is to provide an improved sheet metal pulley which is relatively light in construction and which may be assembled by means of welding or the like and which is sufficiently strong to withstand the wear to which a pulley of this type is subjected.

Another object of this invention is to provide in a pulley of this type an annular grooved means engaging the periphery of the rim which is so constructed that any number of grooves may be formed therein with the ends of the grooved member engaging against the ends of the rim to which the grooved member is secured so that there will not be any waste space on the periphery of the pulley.

A further object of this invention is to provide a pulley of this character which may be provided with dished plates to secure the rim to the hub or which, in the larger pulleys, may be provided with spokes secured to dished members carried by the hub and annular members secured to the inside of the rim.

With the foregoing and other objects in View, the invention will be more fully described herein after, and will be more particularly pointed out in the claims appended hereto.

In the drawing, wherein like symbols refer to like or corresponding parts throughout the several views,

Figure 1 is a detail side elevation of a pulley constructed according to an embodiment of this invention.

Figure 2 is an enlarged fragmentary sectional view taken on the line 22 of Figure 1.

Figure 3 is a fragmentary side elevation of a modified form of this invention.

Figure 4 is an enlarged fragmentary sectional view taken on the line 44 of Figure 3.

Referring to the drawing, the numeral I0 designates generally a hub of substantially cylindrical construction provided with the usual bore I3 therethrough to receive a shaft upon which the pulley I9 may be secured or, if desired, the hub It may be rotatably disposed on a shaft engaging within the bore I3.

A cylindrical rim H is disposed concentrically about the hub I0 and the inside of the rim I I has a pair of disk members or dished plates I2, se-

cured thereto as by welding or the like. The disk members l2 are provided on their outer edge portions with cylindrical flanges I4 contacting with.

the inside face of the rim II and these flanges I4 are secured, as by spot welding or the like, to the rim II.

A pair of dished plates I5 are secured as by welding I6 in spaced apart relation to the hub II] with the concave faces thereof in confronting relation. These dished members I5 are relatively thicker than the disk members I2 so as to provide reinforcing flanges on the hub Ill. The disk members I2 may be secured to the outer faces of 10 the inner disk members or concave flanges I5 by welding or other suitable fastening means so that the rim I I will be supported concentrically of the hub I 0.

A cylindrical tread member, generally desigl5 nated as I1, is mounted on the periphery of the rim I I and comprises a cylindrical sheet of metal which is provided with a plurality of V-shaped grooves or depressions I 8, the bottoms I9 of which are secured as by spot welding 20 or the like to the periphery of the rim II. This cylindrical tread member I! is provided with parallel opposite end portions 2| which are relatively wider than the depth of the grooves I8 formed in this member I! so that the inner edges of the end 25 members 2I will overlap the opposite ends of the cylindrical rim II. The inner edges of the end members 2| are adapted to be tightly secured to the ends of the rim II by means of welding 22, in the form of arc welding or the like. I 30 In Figures 3 and 4 there is disclosed a modified form of this pulley or wheel wherein the hub III has a pair of dished flanges I5 secured to the periphery thereof in spaced apart relation with the concave faces thereof in confronting relation. 35 The flanges I5 are adapted to be secured to the hub III by means of welding I6 or the like. The rim II has secured to the periphery thereof a grooved annulus I'I similar in every detail to the annulus I I with the end portions 2| thereof 40 overlapping the opposite ends of the rim II and secured thereto by welding 22. The rim II has secured to the inside surface thereof, a pair of annular members 23 which are secured, as by welding 24, to the rim II and preferably these 45 annular members 23 are disposed in parallel relation. The hub I0 is held concentrically of the rim I I by means of a plurality of spokes 25 which are secured at their inner ends to the outer faces of the flanges I5 and at their outer ends to the to inner faces of the annular members 23.

A pulley constructed according to this invention may be constructed out of relatively light sheet metal which is suitably reinforced at the points of extreme stress and the pulley has on .55

the periphery thereof a plurality of V-shaped grooves extending substantially from one edge to the opposite edge of the rim l I.

It is, of course, understood that various changes and modifications may be made in the details of construction and design of the above specifically described embodiment of this invention without departing from the spirit thereof, such changes and modifications being restricted only by the scope of the following claims.

I claim:

A sheet metal pulley comprising a cylindrical rim, a hub, a pair of dished flanges engaging about the hub, means for securing the inner edges of said flanges on the hub in spaced apart relation with the concave faces thereof in confronting relation, a pair of dished disk members overlapping said flanges, means for securing said disk members to said flanges, a cylindrical peripheral flange carried by each disk member engaging against the inside face of said rim, a grooved annular member engaging the periphery of the rim, means engaging in the grooves of said annular members securing said annular member to said rim, parallel end members integral with said grooved member, said end members overlapping the opposite ends of the rim, and means for securing said end members to said rim.

HARRY A. ANDREAS. 

